CO adsorption on Rh-ZSM-5 leads to the formation of both the well-known Rh + (CO) 2 gem-dicarbonyls and another kind of dicarbonyl species as yet unknown. The latter are most probably formed with the participation of Rh n + ( n > 1 ) ions in cationic positions in the zeolite . ...
The reaction of hydrogen with the rhodium gem-dicarbonyl species Rh(CO)2 supported on TiO2(110) has been investigated using FT-RAIRS and XPS. The Rh(CO)2 species is prepared by the dissociative adsorption of {Rh(CO)2Cl}2 which also produces adsorbed Cl. The reaction is observed to go ...
Rh1(CO)2 gem‐dicarbonyl species are also observed, but these form exclusively through the breakup of Rh2 dimers via an unstable Rh2(CO)3 intermediate. Overall, our results illustrate how minority species invisible to area‐averaging spectra can play an important role in catalytic systems, and ...
p-polarised and s-polarised FT-RAIRS measurements have been carried out as a function of azimuthal angle θ of the incident radiation on the rhodium gem-dicarbonyl species Rh(CO) 2 adsorbed on TiO 2 (110). The intensity of ν sym (C O) in the p-polarised spectra is independent of θ...